[bug #68409] $(call) doesn't undefine unspecified temporary variables properly

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URL:=0A  <https://savannah.gnu.org/bugs/?68409>=0A=0A                 Summa=
ry: $(call) doesn't undefine unspecified temporary=0Avariables properly=0A =
                  Group: make=0A               Submitter: geza=0A          =
     Submitted: Sat 30 May 2026 11:01:59 AM UTC=0A                Severity:=
 3 - Normal=0A                Priority: 5 - Normal=0A              Item Gro=
up: Bug=0A                  Status: None=0A                 Privacy: Public=
=0A             Assigned to: None=0A             Open/Closed: Open=0A      =
   Discussion Lock: Unlocked=0A       Component Version: 4.4.1=0A        Op=
erating System: POSIX-Based=0A           Fixed Release: None=0A           T=
riage Status: None=0A=0A=0A    ____________________________________________=
___________=0A=0AFollow-up Comments:=0A=0A=0A------------------------------=
-------------------------=0ADate: Sat 30 May 2026 11:01:59 AM UTC By: Geza =
Herman <geza>=0AWhen $(call) is expanded inside a variable, make doesn't un=
define unspecified=0Aarguments properly.=0A=0AI attached a simple Makefile.=
  foo takes 2 arguments.  If it is called=0Adirectly with one argument, $(o=
rigin 2) is correctly "undefined".  But if foo=0Ais called from bar, $(orig=
in 2) reports "automatic". Note: $2's value is empty=0A(so it is not a left=
over of bar's $2), but I think $(origin 2) should be=0A"undefined", just li=
ke when foo is called directly.=0A=0A=0A=0A=0A=0A=0A=0A    ________________=
_______________________________________=0AFile Attachments:=0A=0AName: Make=
file                       Size: 194B=0A    <https://file.savannah.gnu.org/=
file/Makefile?file_id=3D58666>=0A=0A=0A=0A    AGPL NOTICE=0A=0AThese attach=
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e of Savane at=0Ahttps://savannah.gnu.org/source/savane-c36938be85ff6c1b727=
bc7dd7fd30e48f9142870.tar.gz=0A=0A    _____________________________________=
__________________=0A=0AReply to this item at:=0A=0A  <https://savannah.gnu=
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